Here is a gem I found on another similar post:

"Musha ring um a do um a da" is very very similar sounding to these Irish words:
Musha => M'uishe (my whiskey)
ring um a => rinne me/ (rinne = past tense of "de/an" which is "do, make, perform, carry out, commit, turn out, reach, establish"; me/ = "I, me")
do => don (from "do" + "an" = "to the, for the")
um a da => amada/n (fool)

which translates to "I made my whiskey for the fool."